Shelf unit



FIG. 1 is a front, right side, top perspective view of a shelf unit showing my new design;

FIG. 2 is a rear left side, bottom perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is a front, right side top perspective view of the shelf unit when a basket component of the shelf unit has been partially withdrawn out from the shelf unit.

The broken lines depict portions of the shelf unit that form no part of the claimed design. 

CLAIM The ornamental design for a shelf unit, as shown and described. 